Grinding machine



W..C. CORYELL.

GRINDING MACHINE. I

1,492,215, I I Patented Jan. 3, 1922 2 SHEETS-SHEET l.

mmv a k ,I 1' 1 I L 11 19" 12 4 46 I Ill W. C. CORYELL.

GRINDING MACHINE.

APPLICATION FILED Aus.12. 1920.

Patented Jan. 3, 19220 2 SHEETS-SHEET 2- l l l gal-J: I [g]! IIIIIIW Toall whom it may concern: I

Be it known that 1, WILLIAM C. 003mm,

a citizen of the United States, residing at Youngstown, in the county ofMahoning, State of Ohio, have invented certain new and usefulImprovements in Grinding Ma chines, of which the following is aspecification.

The present invention relates to ding machines for the use in dressingthe faces or edges of solids of various forms and shapes, whethercomposed of metal or other material, and whether such dressing be.

chine for working \uponlike objects, in which the dressing wheels areadjustable relatively to the position of the work. In the present casethe position of the wheels remains unchanged when once set, but theposition of the work is adjustable to va the finish uponit. The-genericclaims an the claims of one species are presented in my prior case andthe claims to the other species are found in the present case.

The various features and advantages of the form of the inventiondisclosed herein will be more fully understood upon reference to thefollowing detailed description taken in connection with the accompanyingdrawin and the scope of the invention will be part1cularly pointed outin the appended claims.-

In said drawings, Fi 1 is a side elevation of a grinding, mac incconstructed in accordance with the resent invention; Fig. 2 is asectional elevation of one of the dressing wheels and its associatedbox, the lane of section being indicated by the line A of Fig. 1; Fig. 3is an end elevation of the indmg machine, illustrating a flexible andpassing over the work-guidmg rolls; Fig. 4 is a transverse section ofthe same taken on a plane indicated by the line B-B of Fig. 1; and Fig.5 is an elevation of the work carrier. Throughout these views likecharacters refer to like parts.

Referring to drawings detail, 10

Specification .of Letters Eatent.

Application filed August 12, 1920. Serial No. d03,20.

ed August 27,- 1918, h havedisclosed and claimed a maerence te dqve eilt33. 'llhe ped a.

Patented Jan. 3, 11-222.

designates the base of the machine. J

tals 13 and 14 which are provided with bearings 15 and 16 respectively.These pedestals are preferably castings having strengthening webs andbases b which they are secured to the web 12 o the machine base by bolts17 and 18. lhe bearings 15 and 16 are provided for the trunnions 19 and20 formed at the opposite ends of the carrier frame '21. The latterframe is provided with two pairs of oppositely extending arms 22 and 23.A work engag ng roll 24 is positioned between the arms 22 and. a likeroll 25 is positioned between the arms 23. In each instance a shaftpasses throu h the rolls and arms so that the rolls are cc to rotate. Itwill be noted that the trunnions 19 and 20 are ofiset with reference tothe center of the frame 21 so as to bring the work, such as the belt 26,into line with the axis of the trunnions. The frame 21 and rolls 24 and25 which'constitute the work carrier may be oscillated as a whole aboutthe axis of the trunnions. In order to hold the frame 21 in itsdifi'erently adjusted positions it is provided with an extension or stud27 which is reduced near its outer end to provide a shoulder in closeproximity to a slotted extension 28, extending from the pedestal 14. Thereduced portion of the stud 27 constitutes a threaded stud pin 29'whichextends through the slot in the extension 28. The outer end of this pinis provided with a washer 30 and nut 31 by which the shoulder upon thestud 27 may be drawn tightly against the extension 28 to hold thecarrier in adjusted position.

At a point intermediate of the edestals 13 and 14 the base 10 is alsoprovi ed with a centralpedest'al 32 which 1n the present instance takesthe form of a channel iron which is secured to the web 12 of the base ata plurality of points by the bolts 33. The upper e ges of the membersforming this channel, support the boxes 34 and 35 I of the dressingwheels 36 and 37. As clearly shown, the dove tail 38 on each of theboxes 34 and 35 passes into the channel of the pedestal 32 and engagesthe inner inclined .walls 39 near the top of the pedestal.

Transverse bolts 40 passing through the sides of the pedestal .32 serveto draw them together and properly space them with refends 41 and 42 areconnected in like manner by a longitudinal bolt 43. 'lhe ends 41 and 42are provided with bearings 44 and 45 for a lengitudinal screw 46provided at its opsite ends with hand wheels 47 and 48.

he screw 46 extends through threaded openings in the boxes 34 and 35.One-half of the screw 46 is provided with a righthand thread and theother half is provided with a lefthand thread. Consequently the rotationof the .screw 46 in one direction moves the boxes 34 and 35 towards eachother and the turning of the screw in the opposite direction moves theseboxes apart. This adjustment of the boxes 34 and 35 results in a likeadjustment of the dressing wheels 36 and 37. In the case of box 34,

which is associated with the dressing wheel 36, it will be seen that thebox is provided with a transverse bore 49 into which bushings 50 and 51are fitted for the shaft 52 of the dressing wheel 36. This shaft isreduced in diameter at its opposite ends, in the one case for thereception of the wheel 36 which is retained in place by nut 53, and inthe other case for the reception of the pulley wheel 54 which islikewise retained in place by a nut 55. The upper portion of the box isprovided with an opening 56 through which a lubricant may be applied tothe bearings. The box 35 and associated dressing wheel 37 are similar inconstruction and need not be particularly described, exce t to say thatits pulley wheel is designated 54.

It will be noted that the dressin wheels 36 and 37 overhang the pedesta32 far enough to bring them in line with the work 26 as it passes fromone work engaging roll to the other. In other words, the dressing wheels36 and 37 are brought into the oscillatory axis of the Work carrier. Notonly does this axis intersect the axes of the dressing wheels but itlies in a vertical plane midway between the flanges of the wheels.

The dressing wheels 36 and 37 are curved concavely so as to provide asurface which willengage the edge of the work so as to round it 0d. Theparticular surface upon the wheel for accomplishing this is preferablyconoidal and may be a hyperboloid of revolution such as described morefully in my prior application Serial No. 251,634. With wheels having,such work engaging surfaces it will be seen that a slight oscillation ofthe carrier frame 21 will result in applying the work to the wheels at adifferent angle which will considerably vary the curvature of the outupon the work. This matter has been gone into quite fully in myaforesaid application Serial No.-251,634-and need not be repeated in thepresent case.

In operation, the dressing wheels 36 and 37 are driven by belts 58 and59 traveling over driving pulleys 60 and 61 and pulleys 54 and 57respectively. These belts are driven so as to move the wheels 36 and 37in opposite The dressing wheels 36 and 37 not be driven until the workhas been put in place. In case a flexible belt, such as 26, is to haveits edge dressed, it will be placed over the carrier rolls 24 and 25 asillustrated. Then the dressing wheels will be adjusted by means of thescrew 46 until the surface of the wheels engage the edges of the work.Then the belt 26, which is herewith illustrated as an endless belt, willbe set in correct posithus enable the belt 26 to be removed from themachine. Where an endless belt is worked upon, it will be necessary tolift the carrier frame out of its bearings 15 and 16 in order to removethe belt from the carrier. Where the solid is flexible and is wound oil?of one spindle and on to another this will not be necessary. Variousapplications of the machine to different classes of work will suggestthemselves to those skilled in the art.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. A machine for dressing a solid, including grooved dressing wheelshaving parallel axes, said wheels being positioned so as to engageopposite portions of said solid, workengaging means for guiding saidsolid between said wheels in a plane at an oblique angle to the plane ofthe axes of said wheels, and means for adjusting said work-engagingmeans to vary th angle between said planes.

2. A machine for dressing a solid, including rolls arranged to guide thesolid in a plane, a dressing wheel located in said plane intermediate ofsaid rolls and having a dressing surface shaped so as to presentdifferent ortions to said solid according to the angu ar position ofsaid wheel relative to said plane, and means for adjusting said rollsrelative to said dressing wheel to vary the angular position of saidplane relative to said wheel.

3. A machine for dressing a solid, including guide rolls to guide saidsolid in a plane, a grooved dressing wheel in said plane and operativeto dress said solid at a point intermediate of said rolls, the axis ofsaid wheel being oblique to said first mentioned plane, and meansforadjusting said guide rolls to vary the angle between said firstmentioned plane and the axis of said dressing wheel.

I 4. A machin for dressing a solid, including means for feeding said'solid in a right,

line, a dressing wheel positioned-so as to engage said solid, theengaging fac of said wheel being concave and operative to produce acylindrical surface on said solid, and -means for adjusting said feedingmeans to exten s at an angle to the plane of feed, and

means for adjusting said feeding means to vary the angle between saidplane and said axis of rotation.

Mtery axis of sai 6. A machine of the character described, including abase, boxes movable toward and from each other on "said base, dressingwheels journaled in said, boxes, work guiding rolls, and a frame forsaid rolls mounted for oscillatory adjustment, the axes of said wheelsbein intersected by the oscillaframe.

7. A machine of the character described, including a base, boxes movabletoward and from each other on said base, a work controlling carriermounted for oscillatory adjustment on said base co-operating parts onsaid base and carrier and associated means for establishing any desiredoscillatory adjustment, means for securing said boxes in desiredadjusted positions on said base, and dressing wheels journaled in saidboxes and extending beyond the same, the axes of said wheels beingintersected by the oscillatory axis of said carrier.

8. A machine for dresing a solid, including grooved dressing wheelshaving axes lying in parallel planes, means for guiding said solid withopposite portions in engagement with said wheels in a feed plane atright angles to said parallel lanes and at an oblique angle to the axis0 each of said wheels, and means for adjusting said guiding means toshift said feed plane to vary the obliquity between said feed plane andthe axes of said wheels.

9. A machine for dressing a solid, includincluding a base, pedestalsextending upward from said base and provided with bearin a work guidingframe journaled in sai vbearings, a pair of work-engaging rollsjournaled in said frame, means for adjusting said frame about its axisand securingthe same in adjusted position, and dressing means positionedin said axis and having a curved dressing face operative to providesurfaces of difi'erent curvature upon the work in accordance with thedifferent adjustments of said frame.

11. A machine for dressing a solid, comprising a work carrying frame anddressing wheel and shaft, the work carrying frame being swiveled about aline passing through the central plane of the wheel and intersecting theaxis of the wheel at right angles.

12. A machine for dressing a solid, including means for feeding saidsolid in a plane, and means for adjusting said feeding means about anoscillatory axis to vary the position of the plane of feed, dressingwheels for en aging said solid, the engaging faces of said wheels beingconcave and operative to produce cylindrical surfaces on said solid, andthe plane of the axes of said wheels being perpendicular to verticalplanes throu h said axes and oblique to said plane of fee .7

13. A machine of the character described,

including a base, boxes movable toward and from each other on said base,dressing a WILLIAM C. CORYELL.

